2,4-Dichloro-5-(trifluoromethyl)pyrimidine → (R)-tert-butyl 1-(4-(4-chloro-5-(trifluoromethyl)pyrimidin-2-ylamino)phenyl)ethylcarbamate

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C2 (690 mg, 2.92 mmol) was dissolved in 10 mL DCE:t-BuOH (1:1 vol:vol), and the resultant solution was treated with ZnBr2 (1.97 g, 8.76 mmol) and 2,4-dichloro-5-(trifluoromethyl)pyrimidine (748 mg, 3.45 mmol). The resultant mixture was then treated drop-wise with TEA (406 ml, 2.92 mmol), and the mixture was allowed to stir at 25° C. for about 20 hours. The reaction mixture was concentrated, and the resultant residue was treated with EtOAc. The resultant solution was washed with water and brine, and dried over MgSO4. The mixture was then filtered, concentrated, and purified by column chromatography eluting with 22% EtOAc/Heptane. The product-containing eluents were combined and concentrated to provide C3 as a white solid. Yield: 680 mg, 56%. MS− 415.2. 1H NMR (500 MHz, DMSO) δ: 10.59 (s, 1H), 8.74 (s, 1H), 7.53 (d, 2H), 7.31 (d, 1H), 7.23 (d, 2H), 4.54 (m, 1H), 1.33 (s, 9H), 1.25 (d, 3H).

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